Method and apparatus for controlling a power level of a base station of a wireless communication system
First Claim
1. An apparatus for controlling a base station of a wireless communication system, the apparatus comprising:
- receiving means for receiving a first radio frequency (RF) signal from the base station and determining a received signal strength of the first RF signal;
comparing means for comparing the averaged received signal strength with the received signal strength to determine a fading characteristic, and for further comparing the fading characteristic with a threshold value to determine when the fading characteristic crosses the threshold value; and
control means for sending a power level adjustment signal to the base station when the fading characteristic crosses the threshold value.
3 Assignments
0 Petitions
Accused Products
Abstract
After setting a base station to a transmit power level (12) which provides a signal at a subscriber unit having a target quality level, a fading characteristic of a communication channel between the subscriber unit and a base site is measured (13). The fading characteristic is then compared with a threshold value (14). The measuring (13) and comparing (14) are repeated until the fading characteristic crosses a threshold (15). Once the fading characteristic crosses the threshold for a receive Eb/No level that is representative of a e.g. static fading condition, the base transmit power that is transmitted to the subscriber is increased by a predetermined amount in anticipation of the need for an increased Eb/No for the case of a faded signal (61). The determination of the fading characteristic and threshold comparison may be performed at either the subscriber unit or the base station.
155 Citations
7 Claims
-
1. An apparatus for controlling a base station of a wireless communication system, the apparatus comprising:
-
receiving means for receiving a first radio frequency (RF) signal from the base station and determining a received signal strength of the first RF signal; comparing means for comparing the averaged received signal strength with the received signal strength to determine a fading characteristic, and for further comparing the fading characteristic with a threshold value to determine when the fading characteristic crosses the threshold value; and control means for sending a power level adjustment signal to the base station when the fading characteristic crosses the threshold value.
-
-
2. A method of controlling a base station of a wireless communication system, the wireless communication system having an initial target quality level for a signal communicated between a subscriber unit and the base station, the method comprising the steps of:
-
(a) setting a power level at the base station to obtain the initial target quality level at the subscriber unit; (b) measuring a frequency of fades at which a signal strength of the signal crosses an average of the signal strength; (c) comparing the frequency of fades with a preset frequency of fades representing a threshold level; (d) controlling the base station to reduce the power level when the frequency of fades crosses the preset frequency of fades representing the threshold level. - View Dependent Claims (3, 4)
-
-
5. An apparatus for controlling a base station of a wireless communication system, the apparatus comprising:
-
adjusting means for adjusting a power level of the base station to obtain a target quality level at a subscriber unit; receiving means for receiving a first radio frequency (RF) signal via the communication channel and determining a received signal strength of the received RF signal; averaging means for averaging a period of time of the received signal strength and providing an averaged received signal strength; comparing means for comparing the averaged received signal strength with the received signal strength to determine a fading characteristic, and for further comparing the fading characteristic with a threshold value to determine when the fading characteristic crosses the threshold value; and control means for further adjusting the power level of the base station when a fading characteristic of a communication channel between the subscriber unit and the base station crosses the threshold value. - View Dependent Claims (6, 7)
-
Specification